Optical waveguide switch utilizing means for detecting a tapped

Details Optical waveguide switch utilizing means for detecting a tapped Optical waveguide switch utilizing means for detecting a tapped

1992-06-08

1993-06-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022711, 385 41, H01J 516

Patent

active

052181987

ABSTRACT:
An optical switch with a waveguide used as a detector is disclosed. The switch can be used for circuit or packet switching. The waveguide is used to tap off a fraction of the input signal going into the switch. The waveguide then sends the tapped off signal to a local electronic control to decide if switching is necessary or not. This is determined by within the local electronic control associated with the switch. The switch is set or reset based on information in the electrical representation of the signal which reaches the local electronic control. The switch can be used with continuous input signals as well as data packet input signals. By spacing the timing of data in the header differently than in the data in the "data" portion of a signal, extremely high bandwidth available in pure optical communications can be maintained.

REFERENCES:
patent: 4422088 (1983-12-01), Gfeller
patent: 4759595 (1988-07-01), Boord
patent: 4768854 (1988-09-01), Campbell et al.
patent: 4775207 (1988-10-01), Silberberg
patent: 5148507 (1992-09-01), Tanisawa
"Integrated Optics in LiNbO.sub.3 : Recent Developments in Devices for Telecommunications", Lars Thylen, Jun. 1988 IEEE Journal of Lightwave Technology, vol. 6, No. 6, pp. 847-861.
Photonic Fast Packet Switching at 700 Mb/s, Ha, et al., OFC '91, Wednesday, Feb. 20, p. 78.

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